LED Indication - Discrete

Part Number	Description / PDF	Quantity
150066M173000 Würth Elektronik Midcom	LED RGB CLEAR SMD	1671
150141RS73130 Würth Elektronik Midcom	WL-SMTW SMT MONO-COLOR TOP LED P	1970
156125RS57000 Würth Elektronik Midcom	WL-SMRD SMD MONO-COLOR REVERSE M	3000
156125YV73000 Würth Elektronik Midcom	LED GRN/YLW CLR 1205 SMD BOTTOM	2570
150040VS73220 Würth Elektronik Midcom	WL-SMCC SMT MONO-COLOR CHIP LED	8068
151051VS04000 Würth Elektronik Midcom	LED GREEN DIFFUSED 5MM ROUND T/H	4178
151053RS03000 Würth Elektronik Midcom	LED RED CLEAR 5MM ROUND T/H	764
151053BS04500 Würth Elektronik Midcom	LED BLUE CLEAR 5MM ROUND T/H	2767
150224YS73100A Würth Elektronik Midcom	LED YELLOW CLEAR 2SMD	0
156125RB73000 Würth Elektronik Midcom	LED BLUE/RED CLEAR 4SMD BOTTOM	1096
150060AS75020 Würth Elektronik Midcom	WL-SMCW SMT MONO-COLOR CHIP LED	5468
150080M153000 Würth Elektronik Midcom	LED RGB DIFFUSED SMD	3703
150224RS73100A Würth Elektronik Midcom	LED RED CLEAR 2SMD	0
150505GS73300 Würth Elektronik Midcom	WL-SMTW SMT MONO-COLOR TOP LED W	2000
151054YS04500 Würth Elektronik Midcom	LED YELLOW CLEAR T/H	1939
150505M173300 Würth Elektronik Midcom	LED RGB CLEAR 6PLCC SMD	5596
156125GS75000 Würth Elektronik Midcom	WL-SMRW SMD MONO-COLOR REVERSE M	2087
150060VS75000 Würth Elektronik Midcom	LED GREEN CLEAR 0603 SMD	33310
150080AS75000 Würth Elektronik Midcom	WL-SMCW SMT MONO-COLOR CHIP LED	2396
150060RS75020 Würth Elektronik Midcom	WL-SMCW SMT MONO-COLOR CHIP LED	7092

LED Indication - Discrete

1. Overview

Discrete Light Emitting Diodes (LEDs) are single-chip optoelectronic devices that convert electrical energy into light through electroluminescence. This product category forms the foundation of modern indication systems, offering advantages including low power consumption, long lifespan, and high reliability. Their importance spans across consumer electronics, industrial equipment, automotive systems, and communication infrastructure.

2. Major Types and Functional Classification

Type	Functional Characteristics	Application Examples
Visible LEDs	Emits light in visible spectrum (400-700nm), available in multiple colors	Indicator lamps, display backlighting, decorative lighting
Infrared LEDs	Emits 700nm-1mm wavelength radiation, invisible to human eye	Remote controls, security sensors, night vision systems
High-Brightness LEDs	Enhanced luminous intensity (>1000mcd) with advanced packaging	Automotive lighting, outdoor displays, emergency signage
UV LEDs	Ultraviolet spectrum emission (280-400nm)	Sterilization equipment, counterfeit detection, curing systems

3. Structure and Composition

Typical discrete LED construction includes:

Die: Semiconductor chip (GaN/InGaN for blue/green, AlGaInP for red)
Encapsulation: Epoxy or silicone lens for light extraction and protection
Lead Frame: Copper or iron alloy for electrical connection and heat dissipation
Phosphor Coating: Used in white LEDs for wavelength conversion
Reflective Cup: Optimizes light directionality

4. Key Technical Parameters

Parameter	Significance	Typical Range
Wavelength	Determines light color and application suitability	375nm-940nm
Luminous Intensity	Measures brightness output (mcd)	50-10,000mcd
Forward Current	Operating current rating	20-150mA
Forward Voltage	Electrical potential drop	1.8-3.6V
Viewing Angle	Light emission spread measurement	5 -120

5. Application Fields

Primary application sectors include:

Consumer Electronics: Mobile phone indicators, keyboard backlighting
Automotive: Dashboard indicators, brake light systems
Industrial: Machine status indicators, safety signage
Medical: Diagnostic equipment indicators, phototherapy devices
Telecommunications: Network equipment status lights

6. Leading Manufacturers and Products

Manufacturer	Product Series	Key Features
Cree Inc.	XLamp XP-G3	High brightness (3200mcd), 120 viewing angle
OSRAM Opto	OSTAR Projection	High-power LED for automotive lighting
Nichia Corp.	NSHU5991	UV LED (365nm) for curing applications
Everlight Electronics	LTST-C19HE8WT	Tri-color LED for RGB indication

7. Selection Recommendations

Key consideration factors:

Spectral Requirements: Match wavelength to application needs
Environmental Conditions: Temperature range (-40 C to +85 C typical)
Power Constraints: Select appropriate current/voltage ratings
Optical Design: Consider lens type and viewing angle
Reliability: Check MTTF (Mean Time to Failure) specifications

Industry Development Trends

Current technology directions include:

Miniaturization: Development of micro-LED ( LED) with dimensions <50 m
Efficiency Improvement: Targeting >300lm/W efficacy for visible LEDs
Smart Integration: Incorporating driver ICs and sensors in LED packages
Material Innovation: GaN-on-silicon substrates for cost reduction
Regulatory Compliance: RoHS/REACH compliant packaging materials